On https://gomix.com/community/ there is a github signin button. When you click it, you get redirected to github, then back to the main gomix home page. Looking at it now, I guess this is expected behavior and there isn’t any reason for the public to actually authenticate to https://gomix.com/community/ (ie to submit community projects, vote, etc). But it was a bit confusing since I was already signed in at https://gomix.com. My expectation was that it would show my github avatar if I was signed in already.
You read our minds - we’re working on some updates to the community site that, among other things, will have you signed in to the community site if you’ve already signed in through the editor.